Ubiquinones 11 have been prepared employing a new strategy: as key step, the Diels-Alder reaction of 1, 1, 2-trichloroethene 3 with 2, 5-bis [(trimethylsilyl) oxy]-3-methylfuran (2) has been used for the construction of the quinone part. After methanolysis of the [4+ 21 adducts
